It's possible you're referring to something specific, but the term is too broad. To help me understand what you're looking for, could you please provide more context?
For example, are you asking about:
* A specific electrical code or standard? (e.g., NEC, IEC, etc.)
* A particular clause within a contract or agreement?
* A specific electrical component or circuit?
Once I understand the context, I can provide you with a more accurate and helpful answer.